use hirb by default

also display sql queries in console

config/environments/development.rb

@@ -14,4 +14,15 @@
 config.action_controller.perform_caching             = false
 
 # Don't care if the mailer can't send
-config.action_mailer.raise_delivery_errors = false
+config.action_mailer.raise_delivery_errors = false
+
+# use hirb
+config.gem 'hirb'
+
+if $0 == 'irb'
+  require 'hirb'
+  Hirb.enable
+
+  # show sql queries in console
+  ActiveRecord::Base.logger = Logger.new STDOUT
+end

config/hirb.yml

@@ -0,0 +1,13 @@
+:output:
+# Url Model
+  Url:
+    :options:
+      :fields:
+        - id
+        - name
+        - description
+        - quick_mode_tag_list
+  NamespaceTree:
+    :class: Hirb::Helpers::Tree
+    :output_method: to_tree
+    :ancestor: true